<?php

declare(strict_types=1);

namespace App\Service\Provider;

use Symfony\Contracts\HttpClient\Exception\HttpExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;

trait ProbeTrait
{
    public function probe(): ProviderStatus
    {
        if (!$this->isConfigured()) {
            return new ProviderStatus($this->getName(), ProviderStatusType::NotConfigured);
        }

        try {
            $this->ping();

            return new ProviderStatus($this->getName(), ProviderStatusType::Ok);
        } catch (\Throwable $e) {
            return $this->statusFromException($e);
        }
    }

    private function statusFromException(\Throwable $e): ProviderStatus
    {
        [$error, $message] = $this->classifyException($e);

        return new ProviderStatus($this->getName(), ProviderStatusType::Error, $error, $message);
    }

    /** @return array{ProviderErrorCode, string} */
    private function classifyException(\Throwable $e): array
    {
        if ($e instanceof TransportExceptionInterface) {
            return [ProviderErrorCode::UrlUnreachable, 'Could not reach the server: ' . $e->getMessage()];
        }

        if ($e instanceof HttpExceptionInterface) {
            $code = $e->getResponse()->getStatusCode();

            return match (true) {
                $code === 401 => [ProviderErrorCode::AuthFailed, 'Invalid or expired token — verify your credentials'],
                $code === 403 => [ProviderErrorCode::AuthFailed, 'Access denied — token lacks the required scopes'],
                $code === 404 => [ProviderErrorCode::UrlUnreachable, 'Endpoint not found — check the configured URL'],
                default       => [ProviderErrorCode::Unknown, "HTTP {$code}: " . $e->getMessage()],
            };
        }

        $msg   = $e->getMessage();
        $lower = strtolower($msg);
        $error = match (true) {
            str_contains($msg, 'not found') || str_contains($msg, 'Could not resolve') => ProviderErrorCode::UserNotFound,
            str_contains($msg, 'GraphQL error')
                && (str_contains($lower, 'unauthorized') || str_contains($lower, 'bad credentials')) => ProviderErrorCode::AuthFailed,
            default => ProviderErrorCode::Unknown,
        };

        return [$error, $msg];
    }
}